Advanced Spray Engineering Services

Ensuring Solution Confidence

BETE's extensive resources and more than 60 years of experience are available on a contract basis to help you with processes improvements and with solving existing spray problems. Our facilities include a spray laboratory, a complete machine shop, rapid prototyping, computer modeling, in-house foundry, and a staff with decades of combined experience in diverse fields. We can help you every step of the way!

Spray Laboratory

The BETE spray laboratory is dedicated to the analysis and characterization of sprays, spray nozzles, and their uses.

Most of our testing involves water and air but we can work with small quantities of other, non-hazardous materials. We can test just a nozzle or set up a test in our lab with the nozzle in your application.

Resources Available:

  • An experienced and dedicated team of engineers, designers, and technicians
  • 140 m² spray laboratory
  • Water pumping capacity to 4,000 PSI (275 bar) at low flows and to 2,000 gpm (7,500 L/min) at low pressures
  • Video imaging droplet size analysis
  • Phase-Doppler droplet size analysis
  • Quantitative liquid distribution analysis with the patternator
  • ANSYS® FLUENT® computational fluid dynamics (CFD) and structural analysis software
  • In-house fabrication department for construction of models and special test set-ups
Examples of physical tests of nozzles:
  • Flow visualization in pipes, ducts, and tanks
  • Applications-based testing to measure the effect of a spray in or on a system. These include such things as impact, coating uniformity, reach, wind drift, and spray effectiveness

Spray Room
The spray area is 50' X 30' X 22' high (15 m X 9 m X 6.5 m high). Water is recirculated from a 4,500 gallon (17 m^3) reservoir along one side of the room. Waterproof concrete, metal walls, and waterproof light fixtures allow us to test even large tank washing nozzles.

Nozzles and fixtures are held on a remote-controlled hydraulic boom which provides for height adjustment. An XY traverser carries other specialized instrumentation such as the patternator.

BETE has ample outdoor space near the laboratory that is used for testing of wind drift and reach of fire monitor nozzles or anything else that requires large spaces.

Pumping Capacity
BETE's installed pumping capacity covers pressures to 4000 psi (275 bar) and flows to 2000 gpm (7500 L/min) and includes centrifugal and positive-displacement pumps.

Shop air is available at up to 100 psi and 600 scfm (7 bar and 1000 Nm3/h).

For larger water or air flows we can connect with rental equipment. We have run tests to 7000 gpm (25,000 L/min) of water and 3000 scfm (5000 Nm3/h) of air.

Pattern Measurement
BETE's patternator can measure liquid distribution from a spray as much as 25 feet in diameter. The patternator is a row of tubes each containing a light plastic ball. The patternator is placed under the nozzle to be analyzed and the cover over the tubes is opened for a measured amount of time. The water level in the tubes is measured using custom image-processing software and knowing the physical dimensions of the tubes allows us to calculate the deposition rate into each tube. 

The BETE Model 700 video imaging system was developed in by BETE and has been continuously refined and updated. A strobe light and a video camera with a microscope lens are used to take images of drops as they pass through a defined gap between the light and the camera. Thousands of droplet images are analyzed using a calibration established with an image of an object of known size. With this instrument BETE can characterize sprays with non-round drops from 10-20 000 µm in size such as are typically produced by large nozzles operating at low pressures.

The TSI phase-doppler particle analyzer (PDPA) allows us to measure the size and velocity of drops from 1-5000 µm in size. These are typical of drops produced by smaller industrial and misting nozzles. The ability to measure size and velocity is important for providing input to CFD modeling. 

Other Measurements 
Other instrumentation includes electronic pressure transducers, magnetic and Coriolis flow meters for water flow, and turbine meter systems for air flow.

Computational Modeling

BETE offers computer modeling of sprays and processes using ANSYS® FLUENT® computational fluid dynamics software (CFD). Modeling of a spray process can be very helpful in selecting nozzles, operating conditions, and position when initially designing a process. It can also help find the cause of problems in an existing operation. Examples of our modeling include droplet trajectories and evaporation of sprays in ducts, wetting of walls in furnaces, and mixing of chemicals in pipelines.

Computational modeling (CFD)

  • Evaporation of sprays in gas cooling
  • Single phase flow in ducts or pipes
  • Mixing of two gases or liquids
  • Jet penetration

Computer modeling combined with physical testing in our laboratory gives you confidence in your system design or problem solution.

 Special Testing

Besides characterizing nozzles BETE has set up many unusual tests including:

  • Study of erosion patterns in fluidized beds
  • Pattern distribution of fire protection nozzles with simulated wind
  • Spatial concentration of respirable droplets
  • Comparison of flow rates and spray patterns using oil and water
  • Effectiveness of tank washing nozzles
  • Seal leak tests to ASTM A515 using helium
  • Life cycle testing
  • Pressure vessel strain gauge tests
  • Hydrostatic testing

BETE can fabricate and operate even large test setups as illustrated here. If you need something evaluated, BETE can help you find a way to measure it.


BETE maintains a machine department dedicated to nozzle and manufacturing process development. Machining capabilities include multiple 10" CNC lathes, manual lathes, Bridgeport milling machines, and a four-axis CNC mill. We also own a Stratasys Eden 350V rapid prototype machine with a 13.8" x 13.8" x 7.9" (350 X 350 X 200 mm) build volume that is capable of building in a variety of rigid and flexible plastics. BETE's in-house foundry and welding capabilities allow us to fabricate nearly any type of nozzle or assembly in any material.

Coordinate Measuring
Measurement capabilities include two Mitutoyo coordinate measuring machines, a Romer coordinate measuring arm with laser scanning and touch probe attachments, an optical comparator, and a Mitutoyo profile tracer.


BETE works closely with many control systems companies to be able to offer you integrated spray systems on a custom-designed basis. Systems typically include nozzles, lances, or other nozzle mounting hardware, pumps, instruments, and automatic controls mounted on a skid.



Would you like to know more about BETE and spray nozzles? Give us a call to set up a visit with us here in Greenfield, MA. Click for map & directions.

Lunch and Learn

BETE applications engineers are available to hold a lunch-and-learn at your site or here at BETE. This session is a way for people in your business who work with or specify spray nozzles to learn about types of nozzles, how nozzles can be used, mistakes to avoid when specifying nozzles, and much more. Contact Us to find out about setting up a session.

Contact Us

BETE's R&D department can help you develop a nozzle or nozzle system for your application or help you improve your present process.
Besides nozzle expertise we have experience with hydraulics, electronics, statistics and design of experiments, codes and standards, and many other fields. 

Are you ready to see how BETE can help? Tell us what you need by contacting Daniel deLesdernier
We'll get back to you with an outline of what we can do for you.
While as a matter of course we maintain confidentiality, we are always willing to negotiate special confidentiality agreements if necessary.